scholarly journals Wetting Behavior of Zirconia Nanotubes

2021 ◽  
Author(s):  
Swathi Naidu Vakamulla Raghu ◽  
Manuela S Killian
Keyword(s):  
Electrochemical Anodization ◽  
Wetting Behavior ◽  
Wetting Properties ◽  
Zro2 Nanotubes ◽  
Modified Surface ◽  
Octadecylphosphonic Acid

In this work, we investigate the wettability of ZrO2 nanotubes (ZrNT) synthesized via electrochemical anodization of Zirconium. The ZrNT surface shows superhydrophilic behavior while the octadecylphosphonic acid (C18H37PO(OH)2) modified surface shows superhydrophobic behavior. We demonstrate that the wetting properties are independent of ZrO2 nanotube geometry and length.<br>

scholarly journals Wetting Behavior of Zirconia Nanotubes

2021 ◽  
Author(s):  
Swathi Naidu Vakamulla Raghu ◽  
Manuela S Killian
Keyword(s):  
Electrochemical Anodization ◽  
Wetting Behavior ◽  
Wetting Properties ◽  
Zro2 Nanotubes ◽  
Modified Surface ◽  
Octadecylphosphonic Acid

In this work, we investigate the wettability of ZrO2 nanotubes (ZrNT) synthesized via electrochemical anodization of Zirconium. The ZrNT surface shows superhydrophilic behavior while the octadecylphosphonic acid (C18H37PO(OH)2) modified surface shows superhydrophobic behavior. We demonstrate that the wetting properties are independent of ZrO2 nanotube geometry and length.<br>

scholarly journals Wetting behavior of zirconia nanotubes

RSC Advances ◽  
2021 ◽  
Vol 11 (47) ◽  
pp. 29585-29589
Author(s):  
Swathi Naidu Vakamulla Raghu ◽  
Manuela Sonja Killian
Keyword(s):  
Electrochemical Anodization ◽  
Self Assembled Monolayer ◽  
Wetting Behavior ◽  
Self Assembled ◽  
Octadecylphosphonic Acid

In this work, we investigate the wettability of octadecylphosphonic acid (OPA) self-assembled monolayer (SAM) modified ZrO2 nanotubes (ZrNT) of varied morphologies synthesized via electrochemical anodization of zirconium.

Wetting properties of porous high temperature polymer electrolyte fuel cells materials with phosphoric acid

2019 ◽  
Vol 21 (24) ◽  
pp. 13126-13134 ◽  
Author(s):  
J. Halter ◽  
T. Gloor ◽  
B. Amoroso ◽  
T. J. Schmidt ◽  
F. N. Büchi
Keyword(s):  
Fuel Cells ◽  
High Temperature ◽  
Fuel Cell ◽  
Phosphoric Acid ◽  
Polymer Electrolyte ◽  
Polymer Electrolyte Fuel Cells ◽  
Polymer Electrolyte Fuel Cell ◽  
Wetting Behavior ◽  
Wetting Properties ◽  
Fuel Cell Materials

The influence of phosphoric acid temperature and concentration on the wetting behavior of porous high temperature polymer electrolyte fuel cell materials is investigated.

Surfactant Self-Assemblies Near Contact Lines and their Effect on Wetting by Surfactant Solutions

1994 ◽  
Vol 366 ◽  
Author(s):  
B. Frank ◽  
S. Garoff
Keyword(s):  
Pattern Formation ◽  
Contact Line ◽  
Self Assembly ◽  
Surface Interactions ◽  
Contact Lines ◽  
Dynamic Wetting ◽  
Wetting Behavior ◽  
Wetting Properties ◽  
Surfactant Solutions ◽  
Solid Liquid

ABSTRACTSurfactant self-assembly at the liquid-vapor, solid-liquid, and solid-vapor interfaces controls the wetting behavior of advancing surfactant solutions. While different surfactants exhibit different static and dynamic wetting properties, we show that these behaviors can be understood through an examination of microscopic structures driven by surfactant-surface interactions. We examine surfactant solutions exhibiting complete and partial static wetting as well as spreading by dendritic pattern formation and unsteady, stick-jump behavior. In each case, the observed behavior is related to the structure of the surfactant assemblies in the vicinity of the contact line.

scholarly journals MATERIALI CON BAGNABILITÀ CONTROLLATA. UN’ISPIRAZIONE DALLA NATURA

2020 ◽  
Author(s):  
Silvia Ardizzone ◽  
Daniela Meroni
Keyword(s):  
Cultural Heritage ◽  
Liquid Interface ◽  
Solid Surfaces ◽  
Hydrophilic Surface ◽  
Wetting Behavior ◽  
Wetting Properties ◽  
Cohesive Forces ◽  
Solid Liquid Interface ◽  
Solid Liquid ◽  
Adhesive Forces

The wettability of solid surfaces is the result of the balance between adhesive and cohesive forces. When adhesive forces at the solid/liquid interface prevail over the cohesive forces in the liquid, the drops will spread over the solid leading to a good wetting as in the case of water over an hydrophilic surface. When instead the adhesive forces are weak, the liquid will not wet the surface remaining in droplets, as water on a polymer. Natural materials exhibit tailored wetting behavior: for instance, certain leaves and insects present superhydrophobic properties. By mimicking what nature creates in an exemplary way, the wetting properties of systems can be tailored experimentally to obtain materials with great applicative impact. The possible applications of such phenomena are very numerous and span from biomaterials to antistain materials, from antifog surfaces to systems for the protection of cultural heritage.

scholarly journals Wetting Properties of Polyetheretherketone Plasma Activated and Biocoated Surfaces

2019 ◽  
Vol 3 (1) ◽  
pp. 40 ◽  
Author(s):  
Kacper Przykaza ◽  
Klaudia Woźniak ◽  
Małgorzata Jurak ◽  
Agnieszka Wiącek
Keyword(s):  
Contact Angle ◽  
Free Energy ◽  
Surface Free Energy ◽  
Contact Angle Hysteresis ◽  
Biologically Active ◽  
Adhesive Properties ◽  
Surface Sterilization ◽  
Wetting Properties ◽  
Angle Measuring ◽  
Modified Surface

Polyetheretherketone (PEEK) biomaterial is a polymer which has been widely used since the early 90s as a material for human bone implant preparations. Nowadays it is increasingly used due to its high biocompatibility and easily modeling, as well as better mechanical properties and price compared to counterparts made of titanium or platinum alloys. In this paper, air low-temperature and pressure plasma was used to enhance PEEK adhesive properties as well as surface sterilization. On the activated polymeric carrier, biologically-active substances have been deposited with the Langmuir-Blodgett technique. Thereafter, the surface was characterized using optical profilometry, and wettability was examined by contact angle measuring. Next, the contact angle hysteresis (CAH) model was used to calculate the surface free energy of the modified surface of PEEK. The variations of wettability and surface free energy were observed depending on the deposited monolayer type and its components.

Surface characteristics and wetting behavior of carbon nanotubes

2004 ◽  
Vol 858 ◽  
Author(s):  
Asa H. Barber ◽  
Luqi Liu ◽  
Sidney R. Cohen ◽  
H. Daniel
Keyword(s):  
Carbon Nanotubes ◽  
Contact Angle ◽  
Organic Liquid ◽  
Surface Characteristics ◽  
Resultant Force ◽  
Chemical Changes ◽  
Wetting Behavior ◽  
Wetting Properties

ABSTRACTThe wetting properties and surface characteristics of individual carbon nanotubes are elucidated by immersing the nanotube into various organic liquid. The resultant force acting on the nanotube can be used to evaluate a liquid contact angle at the nanotube surface from classical methods. This technique was shown to be accurate enough to discern differences in wetting behavior due to both structural and chemical changes in the nanotube structure.

Wetting Of Ion Containg Polymers: Micelles Versus Molecular Absorption

1998 ◽  
Vol 543 ◽  
Author(s):  
T. A. Hill ◽  
X. Jiao ◽  
C. W. Martin ◽  
D. D. Demarteau ◽  
D. Perahia
Keyword(s):  
Surface Tension ◽  
Light Scattering ◽  
Chemical Composition ◽  
Surface Structure ◽  
Polymer Surface ◽  
Neutron Reflectivity ◽  
Molecular Absorption ◽  
Wetting Behavior ◽  
Wetting Properties ◽  
Carbon Backbone

AbstractThe wetting behavior of perfluorinated ionomers has been investigated as a function of polymer-surface interaction, the nature of the counter-ion and the structure of the polymer in the solvent from which it has been cast onto the surface. Two different ion-containing polymers, with a per-fluoro-carbon backbone were studied. They differ in the chemical composition and the polarity of their side chains. AFM results together with neutron reflectivity, light scattering and surface tension measurements had shown that the structure of the polymer in the parent solution has a profound effect on the wetting properties as well as the surface structure of the polymers.

scholarly journals Robust Super-Hydrophobic Coating Prepared by Electrochemical Surface Engineering for Corrosion Protection

Coatings ◽  
2019 ◽  
Vol 9 (7) ◽  
pp. 452 ◽  
Author(s):  
Bi ◽  
Li ◽  
Zhao ◽  
Ran ◽  
Cao ◽  
...  
Keyword(s):  
Corrosion Protection ◽  
Surface Engineering ◽  
Electrochemical Etching ◽  
Electrochemical Anodization ◽  
Protection Mechanism ◽  
Hydrophobic Coatings ◽  
Wetting Properties ◽  
Hydrophobic Coating ◽  
Micro Arc Oxidation ◽  
Engineering Materials

Corrosion—reactions occuring between engineering materials and their environment—can cause material failure and catastrophic accidents, which have a serious impact on economic development and social stability. Recently, super-hydrophobic coatings have received much attention due to their effectiveness in preventing engineering materials from further corrosion. In this paper, basic principles of wetting properties and corrosion protection mechanism of super-hydrophobic coatings are introduced firstly. Secondly, the fabrication methods by electrochemical surface engineering—including electrochemical anodization, micro-arc oxidation, electrochemical etching, and deposition—are presented. Finally, the stabilities and future directions of super-hydrophobic coatings are discussed in order to promote the movement of such coatings into real-world applications. The objective of this review is to bring a brief overview of the recent progress in the fabrication of super-hydrophobic coatings by electrochemical surface methods for corrosion protection of engineering materials.

WETTING BEHAVIOR OF WATER MICRODROPLETS IN NATURAL EVAPORATION

2017 ◽  
Vol 48 (12) ◽  
pp. 1077-1088
Author(s):  
Yukihiro Yonemoto ◽  
Tomoaki Kunugi
Keyword(s):  
Wetting Behavior
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